Side element of a shoe upper



FIG. 1 is a side elevational view of a side element of a shoe upper, showing my new design;

FIG. 2 is a front elevational view thereof; and,

FIG. 3 is a top plan view thereof.

The broken line showing of a shoe sole and the remainder of the shoe upper is for illustrative purposes and forms no part of the claimed design. 

The ornamental design for a side element of a shoe upper, as shown and described. 